WO2014196732A1 - 측부순환의 영상화 및 평가를 위한 새로운 자기공명영상기법 - Google Patents
측부순환의 영상화 및 평가를 위한 새로운 자기공명영상기법 Download PDFInfo
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Definitions
- the present invention relates to a novel magnetic resonance imaging technique for imaging and evaluation of the side circulation.
- Cerebral infarction is one of the leading causes of death worldwide. The single cause of death among Koreans is the highest mortality rate and high disability rate. Cerebral infarction is a symptom that is caused by the blockage of the blood supply to the brain tissue as the blood vessels are blocked and the infarction of the brain tissue that received blood. Treatment for cerebral infarction is almost the only treatment by reopening blocked blood vessels early and restoring cerebral blood flow before brain tissue is completely infarcted. Cerebral blood flow is maintained by lateral circulation from the surrounding blood vessels until the blocked cerebrovascular vessels reopen. Thus, the degree of lateral circulation prior to reopening treatment plays a critical role in the fate of brain tissue infarction [Bang OY et al.
- Representative techniques for cerebral infarction using magnetic resonance imaging include diffusion and per fus i on-we ght ed imaging (FLAIR) and Fluid Attenuation Inversion Recovery (FLAIR). These images and maps created through post-processing of images are actively used as image biomarkers in clinical practice. However, despite the development of these various techniques, The method of directly imaging the lateral circulation using magnetic resonance imaging and evaluating the degree has not been developed yet.
- DSA digital substraction angiography
- the DSA technique is invasive to the human body, takes a relatively long time to implement, requires an expert, and carries the risk of developing thromboembolism.
- the side circulation evaluation may be limited in cases where the delayed venous phase is not sufficiently performed or the evaluation of blood vessels opposite the lesion is missed. Therefore, there is a need for the development of a new technique that is non-invasive to the human body and easy and quick to know the degree of side circulation.
- the present inventors have made a thorough research to solve the above problems of the prior art, and have completed the present invention by developing a new method for imaging and evaluating the side circulation using magnetic resonance imaging techniques. Accordingly, it is an object of the present invention to provide a method of imaging the lateral circulation in the body.
- Another object of the present invention is to provide a computer readable recording medium having recorded thereon a program for imaging the side circulation.
- the present invention provides a method for imaging lateral circulation in the body comprising the following steps:
- step (b) imaging the side circulation by comparing the image obtained through post-processing in step (a) with an image of digital subtraction angiography (DSA).
- DSA digital subtraction angiography
- hypothalastomosis refers to a phenomenon in which blood flows bypass to other blood vessels when normal blood flow is blocked due to narrowing or occlusion of blood vessels.
- cerebral blood flow In the case of cerebral blood flow, it consists of anterior circulat ion by bilateral carotid artery and posterior circulat ion by posterior vertebral basal artery. After that, it is branched into anterior cerebral artery, middle cerebral artery and posterior cerebral artery. Each of these vessels is ultimately responsible for blood supply to certain areas of the brain, but the anastomosis between these vessels occurs in several places, resulting in lateral circulation in the lesion of one vessel.
- the side circulation in the present invention includes the side circulation in the brain, heart, extremities, kidneys, and intestine, and more preferably in the present invention, the side circulation is cerebral infarction or Lateral circulation that occurs during myocardial infarction.
- Cerebral infarction refers to a disease in which part of the brain dies because blood vessels of the brain are blocked. Cerebral infarction is caused by blood clots caused by arteriosclerosis of cerebrovascular vessels and occlusion of cerebrovascular vessels by embolism derived from the heart.
- magnetic resonance imaging refers to a diagnostic technique that uses a magnetic field to create a picture of an internal structure.
- the machine used for magnetic resonance imaging forms a very powerful magnetic field in the body by using the pulse of electromagnetic waves, and the structure of the body is imaged using the signals generated in the process of formation and collapse of the magnetic field.
- dynamic susceptibility contrast enhancement is used herein.
- Dynamic susceptibility contrast-enhanced perfusion weighted imaging DSC-PWI refers to a technique for magnetic resonance imaging that detects changes in the magnetic field caused by an increase in susceptibility to magnetization.
- DTPA gadolinium diethylene triamine pent a acetic acid
- image post-processing refers to a series of operations collectively outputting a new image after correction and reconstruction using information of the image as source data after the acquisition of the image.
- a medical image may be defined by a three-dimensional function f (x, y, z), where X, y, and z represent spatial coordinates, and the magnitude of f at the coordinates is determined by the signal intensity of the image. It is called.
- medical images are digital images, they consist of finite elements, each of which has a specific position and value, which is called a voxel. Signal strength values in each voxel are corrected and reconstructed through the image post-processing process, and output as an image composed of new information.
- DSA digital substraction angiography
- the image post-processing of the DSC-PWI source data of step (a) is sequentially performed over time by subtracting the signal of the image obtained before the contrast agent injection from the signals of the images obtained after the contrast agent injection.
- Step (a) -l obtaining an image.
- the tissue to be imaged is excluded in order to exclude the signal due to the anatomical structure and leave only the signal by the contrast agent. Can be visualized.
- the sequential images over time of the DSC-PWI mean a sequential image having a predetermined time interval, the predetermined time interval is preferably 0.1 ⁇ 10 seconds, more preferably 0.5 ⁇ 5 seconds, Even more preferably 1.0-3 seconds, most preferably 1.5-2 seconds.
- the image post-processing of the DSC-PWI source data of step (a) overlaps adjacent continuous image cuts in the sequential images obtained in step (a) -l.
- Step (a) -2 by superimposing adjacent continuous image cuts in the sequential images of the DSC-PWI, the spatial resolution of the image is improved and the signal intensity change over time is maximized.
- the number of overlapping continuous image cuts may be appropriately selected within a range capable of maximizing a change in signal strength over time while improving spatial resolution.
- the superimposition of adjacent continuous image cuts may be performed by overlapping two to ten adjacent continuous image cuts, preferably 2 to 7 pieces, more preferably 2 to 5 pieces, and even more preferably. Superimposes two to three, most preferably two, adjacent consecutive image cuts.
- the contrast between the post-processed DSC-PWI image and DSA image in the arterial phase (arterial phase, capillary phase, venous phase) , Or images corresponding to the late venous phase.
- the term “arterial phase” refers to when contrast staining starts from the insular region of the normal brain parenchyma
- the term “capillary vessel” refers to the time when the whole normal brain parenchyma is stained with the highest signal intensity.
- Vein refers to the time when contrast medium is washed out in the normal brain parenchyma
- late venous refers to the time when the contrast brain signal remains in the lesion brain parenchyma, while the contrast brain is lost all contrast medium.
- the DSC-PWI image in the arterial, capillary, venous, and late venous phases is a continuous image of the above-described "overlapping continuous image cut image". It is composed. More preferably, in the arterial, venous, and late venous phases, the DSC-PWI image consists of two consecutive images of the above-described "overlapping continuous image cuts", wherein the capillary The DSC-PWI image consists of three consecutive images of the above-described "image in which adjacent continuous image cuts are overlapped".
- the DSC-PWI image constituting the arterial group is overlapped to form an early phase image of the side circulation
- the DSC-PWI image constituting the capillary group is lateral circulation by overlapping A mid phase image of the late vein and late vein of the DSC-PWI image constituting the overlap (late phase) image (late phase) of the late phase (late phase).
- the present invention provides a method for producing a side circulation image comprising the following steps:
- the invention provides a computer readable recording medium having recorded thereon a program for producing a side circulation image, comprising the following steps:
- the present invention relates to a novel magnetic resonance imaging technique for rapidly and accurately imaging the lateral circulation in the body.
- the present invention relates to dynamic susceptibility contrast enhancement perfusion-enhanced imaging (DSC-PWI) After post-processing the source data, the post-processing image is contrasted with digital subtraction angiography (DSA) to image the lateral circulation.
- DSC-PWI dynamic susceptibility contrast enhancement perfusion-enhanced imaging
- non-invasive, rapid and easy imaging and evaluation of collateral circulation can provide important information in understanding diseases caused by vascular narrowing or occlusion, determining treatment policy, and prognostic prediction. have.
- the present invention relates to a novel magnetic resonance imaging technique for imaging the lateral circulation in the body.
- the present invention post-processes source data of dynamic susceptibility contrast-enhanced perfusion-enhanced perfusion-enhanced imaging (DSC-PWI), and then compares the image obtained through post-processing with digital subtraction angiography (DSA) to image the lateral circulation.
- DSC-PWI dynamic susceptibility contrast-enhanced perfusion-enhanced perfusion-enhanced imaging
- DSA digital subtraction angiography
- non-invasive rapid and easy imaging and evaluation of the lateral circulation can provide important information for understanding the disease caused by vascular narrowing or occlusion, determining treatment policy, and predicting prognosis.
- DSC-PWI dynamic susceptibility contrast-enhanced perfusion weighted imaging
- FIG. 2 shows the result of superimposing DSC-PWI image cuts in order to obtain the best temporal / spatial resolution during side cycle imaging.
- the best temporal / spatial resolution can be obtained by superimposing two images of two adjacent images. Therefore In contrast, non-overlapping images have a lower spatial resolution, and when more overlaps, the temporal resolution drops.
- the first line is an image obtained by digital subtraction angiography performed on the opposite side of the lesion and consists of an arterial phase, a capi 1 lary phase, and a venous phase, respectively.
- the second row is an image obtained by digital subtraction angiography performed on the lesion side.
- the occlusion of the proximal middle cerebral artery can be confirmed (thin white arrow).
- lateral circulation from the capillary vessel to the right forearm cerebral artery can be observed (thick white arrows). Lateral circulation can be observed up to the late venous phase.
- the third row shows a two-cut superimposed image of the DSC—PWI image corresponding to each period of the digital subtracted angiography image. Staining and washout of contrast media by lateral circulation in the lesion side hemisphere can be identified (black arrow heads).
- the fourth row shows the generation of side circulation images. Two-cut overlapping images of DSC-PWIs corresponding to arterial, capillary, and venous-late venous phases were once again superimposed to generate images capable of evaluating lateral circulation. Each phase corresponds to the early phase, mid phase and late phase.
- Figure 4 shows the process of creating a side circulation image using the automation software FAST-C0LL.
- the patient shows the overall flow from the occurrence of cerebral infarction to the hospital and the generation of lateral circulatory images.
- the image is sent to the workstation, and the side circulation image is generated using FAST-C0LL. Based on the result, the degree of side circulation is evaluated.
- the generated circulatory images are sent to a picture archiving system (PACS) to provide a variety of information about the patient, along with information from other multimodal MRIs.
- PACS picture archiving system
- Panel 5 shows the results of evaluating the degree of collateral circulation in the collateral circulation image.
- Panel (1) is an image evaluated with poor collaterals, where the contrast agent stain on the lesion side is completely absent until the late phase or only in some areas. When stained with slow side circulation.
- Panel 2 is an image evaluated with intermediate col laterals in which some areas of the lesion side are stained with fast lateral circulation while some of the lesions are completely absent.
- Panel 3 is an image evaluated for good collaterals, where the contrast agent stain on the lesion side is completely stained with slow lateral circulation.
- Panel 4 is an image evaluated with excellent collaterals, where the contrast agent stain is completely stained with fast collaterals.
- FIG. 6 is a graph showing the change over time of the combined R 2 * values by adding the R 2 * values of all voxels in each cut of DSC-PWI source data.
- Figures 7a to 7d is a 'graph showing the outcome after cerebral infarction with and without rating and revascularization opening of collateral circulation that is observed in the collateral image.
- ER early recanalizat ion
- G grade
- Each grade Gl, G2, G3 and G4 of the lateral circulation has poor collaterals, intermediate collaterals, good collaterals, and superior lent col laterals. (See Example 5 and FIG. 5), respectively.
- FIG. 7A the higher the degree of side circulation, the higher the probability of having a good functional prognosis.
- FIG. 7B the higher the degree of lateral circulation, the higher the probability of showing good neurological improvement.
- FIG. 7C the higher the grade of lateral circulation, the lower the probability of developing symptomatic cerebral hemorrhage.
- FIG. 7D the grade of lateral circulation is higher and the specific mortality rate is lower.
- Example 2 Image Superposition for Obtaining the Best Temporal and Spatial Resolution
- images obtained from the DSC ⁇ PWI were gradually superimposed to compare the temporal and spatial resolutions to each other (Fig.
- Example 2 In the process of Example 2 as a final step for imaging the side circulation The determined two-cut fold images were matched with the images obtained by digital subtraction angiography (FIG. 3). To this end, visual contrast of staining and washout of the normal and lesion brain parenchyma is visually determined in the two-cut superimposed images to determine the arterial phase and capillary phase of digital subtraction angiography. The images corresponding to the venous phase were selected. Specifically, when the arterial phase begins staining of contrast agent from the insular region of the normal brain parenchyma, the capillary vessel is stained with the highest signal intensity, and the venous phase is the normal brain parenchyma.
- Each of these phases typically consists of three consecutive images of capillary, two consecutive arterial venous and late venous two consecutive superimposed images.
- Lateral circulatory images were generated by superimposing two superimposed images of two arteries, three superimposed images of capillary vessels, and four superimposed images of veins and late veins.
- Each phase of the generated side circulation image corresponds to an early phasae, a mid phase and a late ate phase.
- the degree of side circulation can be evaluated from the generated image.
- the degree of side circulation can be largely divided into no side circulation, slow side circulation and fast side circulation.
- No collateral is if the show does end visible staining of the contrast agent in the (late phase) end and (late phase) when the contrast dye completely invisible to slow, collateral is middle (m id phase), Quick collateral circulation It refers to the case where the contrast agent is seen from the mid phase in the lesion side to the extent similar to the normal side. Based on this, the side circulation can be evaluated. As shown in the side circulation image of FIG.
- the prognosis according to vascular reopening after vascular revascularization can be predicted in patients with acute cerebral infarction.
- Figures 7a to 7d regardless of whether the vascular reopening in acute cerebral infarction, the better the lateral circulation, the higher the probability of having a good prognosis, and the lower the probability of symptomatic bleeding and death.
- the vessels are reopened in the case of high lateral circulation observed in the lateral circulation images, a good prognosis can be expected without the risk of symptomatic cerebral hemorrhage.
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US14/895,597 US20160125597A1 (en) | 2013-06-03 | 2014-04-17 | Novel magnetic resonance image technique for imaging and evaluating collateral circulation |
EP14807402.4A EP3005943B1 (en) | 2013-06-03 | 2014-04-17 | Novel magnetic resonance image technique for imaging and evaluating collateral circulation |
JP2016518256A JP6240319B2 (ja) | 2013-06-03 | 2014-04-17 | 側副循環の画像化及び評価のための新しい磁気共鳴画像法 |
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JP6240319B2 (ja) * | 2013-06-03 | 2017-11-29 | サムスン ライフ パブリック ウェルフェア ファウンデーションSamsung Life Public Welfare Foundation | 側副循環の画像化及び評価のための新しい磁気共鳴画像法 |
KR101797141B1 (ko) * | 2016-04-18 | 2017-11-13 | 성균관대학교산학협력단 | 자기 공명 영상 처리 장치 및 그 영상 처리 방법 |
CN106821364B (zh) * | 2017-02-08 | 2020-07-03 | 中国科学院心理研究所 | 无创检测颈内外侧支循环的设备、非诊断方法及应用 |
KR102001790B1 (ko) * | 2018-12-24 | 2019-07-23 | (주)제이엘케이인스펙션 | 인공지능 기반 혈류 구간 분류 방법 및 시스템 |
WO2020207597A1 (en) * | 2019-04-12 | 2020-10-15 | Brainlab Ag | Frameless anatomy-based 2d/3d image registration |
KR102272741B1 (ko) * | 2019-07-11 | 2021-07-02 | 가톨릭대학교 산학협력단 | 4차원 자기공명 혈관조영술의 영상정보 후처리를 통한 3차원 감산 동맥조영술과 3차원 감산 정맥조영술 및 4차원 컬러 혈관조영술의 동시 구현 방법과 의료영상 시스템 |
US11145057B2 (en) * | 2019-11-05 | 2021-10-12 | Siemens Healthcare Gmbh | Assessment of collateral coronary arteries |
KR102613857B1 (ko) * | 2021-11-03 | 2023-12-14 | 사회복지법인 삼성생명공익재단 | 딥러닝 모델 기반의 동적 관류 mri 영상을 이용한 측부 순환 평가 방법 및 분석장치 |
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JP4379559B2 (ja) * | 1999-04-30 | 2009-12-09 | 株式会社日立メディコ | 磁気共鳴イメージング装置 |
CN103635136B (zh) * | 2011-04-29 | 2016-05-25 | 磁共振创新有限公司 | 组织相似度图 |
JP6240319B2 (ja) * | 2013-06-03 | 2017-11-29 | サムスン ライフ パブリック ウェルフェア ファウンデーションSamsung Life Public Welfare Foundation | 側副循環の画像化及び評価のための新しい磁気共鳴画像法 |
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See also references of EP3005943A4 |
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US20160125597A1 (en) | 2016-05-05 |
JP6240319B2 (ja) | 2017-11-29 |
JP2016520405A (ja) | 2016-07-14 |
JP2017213424A (ja) | 2017-12-07 |
KR101568826B1 (ko) | 2015-11-16 |
EP3005943A4 (en) | 2017-05-10 |
KR20140142652A (ko) | 2014-12-12 |
EP3005943B1 (en) | 2020-09-23 |
EP3005943A1 (en) | 2016-04-13 |
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